Speed-changing device.



PATENTED JUNE 18, 1907. R. K. LE BLOND t W. E. GROENE. y

SPEED CHANGING DEVICE. APPLICATION FILED Huy-8,1905.

lia/'enfans'.

' J.. WLLa/L roc/Le i RICHARD K. LE BLOND AND y ferent speeds can be transmitted from a prip nur earns nfrnnr WILLIAM F. GROENE, CF CINCINNATI, OHIO.

ePsED-ceianeine. nausea..

Specification of Letters Patent.

Patented. June 18, 1907.

Application led July 8,1905. Serial No. 268,845.

To LZ/l whom, t 'ma/y concern.-

Be it known that We, R101-IARD In'. LE BLOND and WILLIAM F. GROENE, citizens of the United States, residing at Cincinnati, in

mary or driving shaft through a simple arrangement of intermediate connections to ,the parts to be driven.

It frequently becomes necessary, not only to change the speed of parts in a device of the general character of Patent No. 788,658, but to reverse the direction of movement of the driven part, particularly in the case of machine-tools and lathes. In our previous f patent, when such reversal became necessary while the parts were being driven through the initial speed, two movements were required to secure the desired results, and, as one of the objects of the present invention, we have-sought to simplify said speed changing device in this and other respects, so that While a Wide range of varying speeds are possible, the device can be readily and simply manipulated to run the same, either backward or forward.

With these generally' stated objects in view, the invention consists of the parts and combinations hereinafter described and definitely pointed out in the claims.

In the drawing, Figure l is a central vertical longitudinal section of the speed changing device 'in its simple form, only so much of the adjunctive parts being shown as are necessary to show the essentials of structure, and Fig. 2 is a similar view of a modified form of the invention, the casing being omitted and the parts developed to disclose the structural essentials.

In the drawings, whichshow the invention as applied to a machine tool for driving the spindle shaft at varying speeds, A represents t e casing or frame-work for suitably ysupporting and covering the operative parts,I and such casing may be similar to that described in our previous patent, No. 788,658.

Suite-bly journaled in bearings b b in the upper part of the casing A is the driving shaft B, lwhich may, as in said patent, be driven from any convenient or suitable source of l power through the pulley B.

Loosely mounted on the driving shaft B, are the two prime or driving gears B2 and 133 either of which may be operatively connected to the driving shaft, as desired by means of the sleeve, splined to but movable longitudinally on the driving shaft, and provided with friction faces t, b', which, in effect, consti- 'tute the sliding member of a double friction clutch disposed between the two prime or driving gears, B2 and B3, so that, by movin(r this double friction member into frictiona engagement with one orthe other of the gears B2 or B3, by a suitable device B5, shown in dotted lines, either one ofsaid gears may be made to rotate with the driving shaft B, as will be obvious. The detailed construction of the double friction clutch member is quite immaterial and, being a well known machine element, its particulars of specific structure need no illustration or description.

Suitably journaled inbearings'c c is the Shaft C, which, for identification, may be denominated the intermediate or transmitting shaft. Secured to the transmitting shaft C are the series of gears C', C2 and C3 of different diameters, with two of which the prime or driving gears B2 and B3 are in constant enagement. From this simple arrangement, it will be noted the transmitting shaft C will be driven from the gear B2 or B3, according to which of these gears is, for thetime bein connected to the driving shaft by the clutc 1 member B4, the others of said gears B2 or B3 running idle, but yet in engagement with its gear on the transmitting shaft. Mounted .to turn in suitable bearings d d of the casing or frame is the s indle shaft I), to whichvarying speeds are to e transmitted for application to the particular' work in. hand. Loosely mounted upon the s indle shaft is the sleeve E, extending near y the length of the spindle shaft between its bearings d d.

tion shown for the slipigear connection com- IOS prises the gear F 2, having an extendedsleeve portion f, and on this extended sleeve portion are keyed the two gears F F said slip gears being movable longitudinally of the sleeve E while rotatable therewith, by means of a suitable ha'ndoperated device G, similar in this respect to the device for like purposes shown and described. in our previous patent. The size of the gears F F F2 is such that one of said slip gears may be moved into engagement with its conlplemental gear on the intermediate shaft C, so that, rotary motion being imparted to the intermediate shaft C, it may be transmitted from said shaft through any one of the intermediate gears C', C2 and U3, to the slip gears, and fronnsaid slip gears,

this variable speedv is, of course, transmitted to the sleeve E. In order that the variable motions thus imparted to the sleeve E, which is loosely mounted onthe spindle shaft, may he transmitted to the spindle shaft direct, the said sleeve is provided at one end with a disk E having a hole or perforation e, adapted to receive a` movable locking-pine', carried by a face gear H, fixed to the spindle shaft D inany suitable manner, as by spline or key h, so that the spindle shaft and face gear H shall rotate together. From this construction, it will be a parent that the variable motions given to t e sleeve through the driving gears, the intermediate gears and the sli gears may be directly transmitted to the spindle shaft D by lengagin the locking pin c with the perforation or ole e in the disk E. Variable speeds thus imparted to the sleeve E may be transmitted to the spindle in a still further varying speed motion by means of the back gears. lVe have Anot deemed it necessary in this present case to specifically describe the back Oears and eccentric mounting of the back schaft, as such construction in the present case is the same in all respects as shown and described in our previous patent, No. 788,658, Fig. 3 thereof, to which reference has been made.

We have thus described a simple, conven l ient and readily mani ulated speed changing structure which may e rotated either backward or forward, as desired, by simple hand manipulation of the driving instrumentalities, and 'wherein the speeds may be readily changed, either by the double friction clutch member B4 or by the slip gears movable into engagement with the intermediate gears selcwively, on the intermediate shaft; and, vfhuc this particular construction is found desirable and efficient, it is Ato be understood that changes may be made therein within the scope of the present invention. Without attempting to illustrate and describe all the` changes that may be made, We 'have shown in Fig. 2 one modified form of the invention, in which the driving shaft has mounted on it loosely the two gears B12 and B13, correspondl gear senses ing to gears )BZ/B3, of Fig. 1, and, as in said l, the ,double clutch member B14 is solinede-to the driving shaft, making either of these gears operative withthe shaft. In the modified form of invention, instead of mounting the slip gears on the sleeve E, as in Fig. 1, we mount said slip gears upon the intermediate shaft, as shown in Fig. 2, and spline the slip gears to said intermediate shaft C. The slip gears in Fig: 2 are designated as F10, F, F12, and secured to the intermediate shaft at each side of the slip gears are two transmitting gears C12 and C13, said intermediate gears being in constant yengagement with the driving gears B12 and B13 respectively on the driving shaft. Upon the sleeve E, Fig. 2,

are ixedly secured the gears K, K', K2, suitably spaced apart and varying in size so as to be engaged each by its complemental gear F10, F11, and FIZ of the slip gears, motion imparted to the intermediate shaft C may be transmitted-in varying manner, as will be understood by thoseskilled in the art, to the sleeve E.

As in Fig. l, so in Fig. 2,

H, secured to the spindle shaft, and it may be connected to the sleeve E by the pin c', and hole e in the disk E', to drive the spindle shaft directly from the sleeve. We have shown, also, 'in Fig. 2 in a developed condition the back shaft L, corresponding to the back 'shaft as described in our previous patent, and this back shaftl L is provided with gears of varying size, Lf L2, whereby the varying speeds given to the sleeve E may be transmitted through the back shaft from one of the gears K on the sleeve to the face gear AH along the shaft, the pin e at such times being out of en agement with the hole e of the disk E', su stantially as disclosed and described in our previous patent.

Of course, it will be understood that various changes in the form, disposition and relation of parts may be made within the' scope of our invention.

Having thus described my invention, what;

I claim as new and desire to secure by Letters Patent of the United States is:

i. in combination, a driving shaft, a driven shaft, an intermediate shaft, a series of gear-wheels mounted on the intermediate shaft adapted to rotate in unison and prevented from longitudinalmovement, said driven shaft being geared to said gears, a sleeve on the driving shaft and a lurality of pinions thereon arranged to be t roWn into mesh with the gear wheels on the intermediate shaft.. y f

In combination, a driving shaft, a driven shaft, and an intermediate shaft, gears on said intermediate shaft adapted to rotate in unison and prevented from lo ofitudinal movement, a sliding sleeve on t e driven shaft, a series of gears on said sleeve,

whereby v there is a face Mrmged to mesh with 'bha gems on the inter- 'l l In testimony whereof We gfx our signa.- nnwdmnte. shaft, a sleeve armnged to shde on I ture 1n presence of two wiltnesses.

the diving shaft, a. series* of gears thereon I g RCHD. K. LE BLOND. @munged no mesh with the gearson said ini WILLIAM F. (SrROENE.A tmmedte Shaft, sind means for shftin the -Wtnesses:

shame@ 3o to change the speed o the GRACE PUGH, 

